Archaeologists have made an extraordinary discovery in Vannes, France, where they found an exceptionally well-preserved 640-year-old medieval castle, the Château de l'Hermine, lying directly beneath the courtyard of the popular Hotel Lagorce. Built in the 1380s by Duke John IV, this 14th-century structure has delighted researchers with its remarkable state of preservation, providing insights into the architectural techniques of the period. The castle's dimensions were significant, measuring 42 meters in length and 17 meters in width, and included walls of substantial thickness, suggesting it was a formidable structure in its time.

Excavations, which took place during the spring and autumn of 2023, revealed various features of the castle, including its robust fortifications and layout, indicating its role as a ducal residence. The findings have excited archaeologists and historians alike, as they provide a tangible connection to the medieval past of the region. The National Institute for Preventive Archaeological Research has commented on the incremental nature of the excavations that brought this hidden gem to light, emphasizing the importance of careful archaeological practices in uncovering historical treasures.

The discovery not only sheds light on the history of Vannes and Brittany but also raises questions about the preservation of historical sites and the ongoing impact of modern development on archaeological heritage. As the castle was located beneath a popular hotel, discussions may emerge about the future of the site and how to balance tourism with preservation efforts, ensuring that such significant historical landmarks are respected and protected for future generations to appreciate.